Lets add some useful functionality to our library project1. The tests 2 for this exercise will help you work out the correct implementation. Use them!

What’s to do

  • Add (readonly) static limit MAX_MEDIA_COUNT to UserAccount to express that a user can only borrow 10 items
  • Add Borrow and ReturnMedia methods to UserAccount (return bool)
  • ReturnMedia should also update the Fees
  • You can only return what you have borrowed.
  • You can only borrow if MAX_MEDIA_COUNT is not reached
  • Add a property BorrowedCount to UserAccount that gives the curred number of borrowed items of this account
  • Add Borrow and ReturnMe methods to Medium that marks/unmarks the borrower (UserAccount) and sets the returnDate/calculates the fees if late
  • Add a method Authentificate to Library to identify a user. It shall take an long id and return a UserAccount object or null if this id is not connect to any account

  1. You can find the solution to this task Here. ↩

  2. You can find the tests for this task Here ↩